<p>The device has a gas spring (1) hinged at a rear flap of a vehicle body with a piston rod (3) and a pressure pipe (2) at a distance to a swivel axis. An energy storage (4) force impinges the flap in its clamping position during its opening strokes from a closing position until reaching a release position of the storage. The storage is arranged in the rod, and the pipe movably and forcibly impinges in the driving direction of the piston rod.</p>
